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CN102843105A - System for amplifying signals generated by a signal-generation unit of a satellite - Google Patents

System for amplifying signals generated by a signal-generation unit of a satellite Download PDF

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CN102843105A
CN102843105A CN2012102431084A CN201210243108A CN102843105A CN 102843105 A CN102843105 A CN 102843105A CN 2012102431084 A CN2012102431084 A CN 2012102431084A CN 201210243108 A CN201210243108 A CN 201210243108A CN 102843105 A CN102843105 A CN 102843105A
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CN102843105B (en
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E·赛南特
C·佩罗特
C·费尔内
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Thales SA
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/14Relay systems
    • HELECTRICITY
    • H03ELECTRONIC CIRCUITRY
    • H03FAMPLIFIERS
    • H03F1/00Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/32Modifications of amplifiers to reduce non-linear distortion
    • H03F1/3241Modifications of amplifiers to reduce non-linear distortion using predistortion circuits
    • H03F1/3252Modifications of amplifiers to reduce non-linear distortion using predistortion circuits using multiple parallel paths between input and output

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Abstract

The system (SA) has an amplification device (DA) provided with a pre-amplifier and an amplifier. First and second channels (V1, V2) respectively comprise bandpass digital filters (F1, F2) for filtering digital signals generated by a signal generation unit (UGS). The second channel has a gain (G) arranged at an output of the filter, and a numerically controlled oscillator (NCO) arranged in an output of the gain. A digital/analog converter (CNA2) is arranged at an output of the oscillator. A recombining unit (S) enables summing up of signals from the channels. An independent claim is also included for a method for amplifying signals generated by a signal-generation unit of a satellite.

Description

用于放大由卫星信号发生器单元生成的信号的系统System for amplifying a signal generated by a satellite signal generator unit

技术领域 technical field

本发明涉及用于对由卫星信号生成单元生成的信号进行放大的系统。The invention relates to a system for amplifying a signal generated by a satellite signal generating unit.

背景技术 Background technique

卫星放大系统(例如通信或导航卫星)在其最佳效率区内使用,从而实际上导致结果为非线性的功率响应。Satellite amplification systems (such as communication or navigation satellites) are used in their region of optimum efficiency, effectively resulting in a resulting non-linear power response.

这些非线性导致在有用的频段之外或者“杂散”的功率传播(互调制产物),必须以高功率对这种功率传播进行滤波以遵循频率法规。These non-linearities lead to out-of-band or "spurious" power spreads (intermodulation products) that must be filtered at high powers to comply with frequency regulations.

因此,这种处理的实现方式在质量和体积两方面增加了卫星的负载并使其复杂化。The implementation of this processing therefore increases and complicates the load on the satellite, both in terms of mass and volume.

通过在信号生成时使用信号数字预失真来使放大器线性化的技术是已知的,诸如作为例子由专利US 6549067 B1所示出的。Techniques for linearizing amplifiers by using digital predistortion of the signal at signal generation are known, such as shown by patent US 6549067 B1 as an example.

该实施例对RF级(或射频级)施加高带宽,从而在卫星的负载方面带来较强的影响。This embodiment imposes a high bandwidth on the RF stage (or radio frequency stage), resulting in a strong impact on the loading of the satellite.

基于通过在非线性的反相、在功率方面(power-wise)进行仿真(特别地借助二极管)在放大设备的输入处执行对非线性的补偿的硬件线性化器的技术也是已知的,诸如作为例子由法国专利申请FR 2722350所示出的。Also known are techniques based on hardware linearizers that perform compensation of the nonlinearity at the input of the amplifying device by emulating power-wise (in particular with the aid of diodes) in the inversion of the nonlinearity, such as Shown as an example by French patent application FR 2722350.

对于在卫星上常用的基于晶体管的放大器而言,这些实施例是相当低效的。These embodiments are rather inefficient for transistor-based amplifiers commonly used on satellites.

发明内容 Contents of the invention

本发明的目的减轻上述问题。It is an object of the present invention to alleviate the above-mentioned problems.

根据本发明的一个方面,提出了用于对由卫星信号发生器单元所生成的信号进行放大的系统,该系统包括:According to one aspect of the invention, a system for amplifying a signal generated by a satellite signal generator unit is proposed, the system comprising:

第一路径,其包括用于在有用的频带之外对由所述单元生成的数字信号进行滤波的具有有限脉冲响应的第一带通数字滤波器,以及置于所述第一数字滤波器的输出处的第一数字/模拟转换器,A first path comprising a first band-pass digital filter with a finite impulse response for filtering the digital signal generated by the unit outside the useful frequency band, and an The first digital/analog converter at the output,

频率移置模块,其用于将基带中或中频中的信号转换成载波频带中的信号,以及a frequency transposition module for converting a signal in the baseband or in the intermediate frequency into a signal in the carrier frequency band, and

放大设备,其包括预放大器和放大器,amplifying equipment, which includes preamplifiers and amplifiers,

此外,特征在于其包括:Additionally, it is characterized in that it includes:

第二路径,其包括用于在其有用的频带之外对由所述单元生成的数字信号进行滤波的具有有限脉冲响应的第二带通数字滤波器、置于所述第二数字滤波器的输出处的增益模块、置于所述增益模块的输出处的相位从动(phase-slaved)数控振荡器、以及置于所述数控振荡器的输出处的第二数字/模拟转换器,以及A second path comprising a second band-pass digital filter with a finite impulse response for filtering the digital signal generated by the unit outside its useful frequency band, placed at the end of the second digital filter a gain block at the output, a phase-slaved numerically controlled oscillator placed at the output of said gain block, and a second digital/analog converter placed at the output of said numerically controlled oscillator, and

复合器设备,其用于将所述第一和第二路径的信号相加。a multiplexer device for adding the signals of the first and second paths.

该系统使得能够将该方法的效果集中在受非线性现象影响的频带上,而非以如现有解决方案所提出的全局方式。因此,这潜在地允许通过移除高功率输出滤波来使完整链简化。This system makes it possible to focus the effect of the method on frequency bands affected by nonlinear phenomena, rather than in a global way as proposed by existing solutions. Thus, this potentially allows for a simplification of the complete chain by removing high power output filtering.

根据一个实施例,所述频率移置模块置于所述复合器设备的输出和所述放大设备的输入之间。According to one embodiment, said frequency displacement module is placed between the output of said multiplexer device and the input of said amplification device.

在这种情况下,在同一时间需要单个频率移置和放大设备用于有用信号和补偿信号。In this case, a single frequency displacement and amplification device is required for the useful signal and the compensation signal at the same time.

在一个实施例中,所述频率移置模块包括:本地振荡器;混频器,其适用于通过将所述频率移置模块的输入信号与本地振荡器的输出信号相乘来以频率方式(frequency-wise)相加;以及,第三模拟带通滤波器,其用于隔离所述相乘的结果。In one embodiment, said frequency shifting module comprises: a local oscillator; a mixer adapted to frequency-wise ( frequency-wise) addition; and, a third analog bandpass filter for isolating the result of the multiplication.

根据另一实施例,所述频率移置模块包括:According to another embodiment, the frequency displacement module includes:

第一频率移置子模块,其置于第一路径上在所述第一转换器的输出和所述加法器的输入之间,以及a first frequency displacement sub-module placed on a first path between the output of said first converter and the input of said adder, and

第二频率移置子模块,其置于第二路径上在所述第二转换器(CNA2)的输出和所述加法器的输入之间。A second frequency displacement sub-module placed on a second path between the output of said second converter (CNA2) and the input of said adder.

在这种情况下,可以将专用于有用信号(第一路径)的频率移置设备的有用带宽限制到该信号的有用频带。In this case, the useful bandwidth of the frequency displacement device dedicated to the useful signal (first path) can be limited to the useful frequency band of this signal.

在一个实施例中,所述第一和/或第二频率移置子模块分别包括:本地振荡器;混频器,其适用于通过将所述频率移置子模块的输入信号与本地振荡器的输出信号相乘来以频率方式相加;以及,第三模拟带通滤波器,其用于隔离所述相乘的结果。In one embodiment, the first and/or second frequency displacement sub-modules respectively include: a local oscillator; a mixer, which is adapted to combine the input signal of the frequency displacement sub-module with the local oscillator and a third analog bandpass filter for isolating the result of said multiplication.

因此,可以对补偿信号进行线性放大,从而简化这种补偿的从动。Therefore, the compensation signal can be linearly amplified, thereby simplifying the slave of this compensation.

根据本发明的另一方面,还提出了用于放大卫星信号的方法,该方法包括以下步骤:According to another aspect of the present invention, a method for amplifying satellite signals is also proposed, the method comprising the following steps:

在第一路径上,对发射的信号进行数字滤波,以便消除偏离有用频带的部分并且将获得的数字信号转换成模拟信号,On the first path, the transmitted signal is digitally filtered in order to eliminate parts deviating from the useful frequency band and the obtained digital signal is converted into an analog signal,

在第二路径上,对发射的信号进行数字滤波,以便消除偏离有用频带的部分;将增益应用于获得的数字信号;同步所述信号以与所述第一路径的信号一致;以及,将获得的数字信号转换成模拟信号,On the second path, the transmitted signal is digitally filtered so as to eliminate the part deviating from the useful frequency band; a gain is applied to the obtained digital signal; the signal is synchronized to be consistent with the signal of the first path; and, the obtained The digital signal is converted into an analog signal,

将所述第一和第二路径的信号相加,summing the signals of the first and second paths,

执行频率移置,以便将基带中或中频中的信号转换成载波频带中的信号,以及performing a frequency transposition to convert a signal in baseband or intermediate frequency to a signal in the carrier frequency band, and

在发射之前对信号进行放大。Signals are amplified prior to transmission.

附图说明 Description of drawings

在研究通过完全非限制性示例描述并通过附图示出的数个实施例之后,将会更好地理解本发明,其中:The invention will be better understood after studying several embodiments described by way of purely non-limiting examples and illustrated by the accompanying drawings, in which:

图1示意性地示出了根据本发明的一个方面,用于对由卫星信号发生单元生成的信号进行放大的系统的实施例;以及Figure 1 schematically illustrates an embodiment of a system for amplifying a signal generated by a satellite signal generating unit according to an aspect of the present invention; and

图2示意性地示出了根据本发明的一个方面,用于对由卫星信号发生单元生成的信号进行放大的系统的另一实施例。Fig. 2 schematically shows another embodiment of a system for amplifying a signal generated by a satellite signal generating unit according to an aspect of the present invention.

在所有的附图中,具有相同标记的元件是类似的。Elements with the same number are similar in all figures.

具体实施方式 Detailed ways

图1示意性地表示了用于对由卫星的信号发生单元UGS生成的信号进行方法的系统SA。该放大系统SA包括:第一路径V1,其配备具有有限脉冲响应的第一带通数字滤波器F1,所述第一带通数字滤波器F1用于在其有用频带之外对由单元UGS生成的数字信号进行滤波;以及,第一数字/模拟转换器CNA1,其置于所述第一数字滤波器F1的输出处。该放大系统SA还包括:频率移置模块MTF,其用于将基带中或者中频中的信号转换成载波频带中的信号;以及,放大设备DA,其包括预放大器和放大器。FIG. 1 schematically shows a system SA for performing methods on signals generated by a signal generating unit UGS of a satellite. This amplification system SA comprises: a first path V1 equipped with a first band-pass digital filter F1 with a finite impulse response for the and a first digital/analog converter CNA1 placed at the output of said first digital filter F1. The amplification system SA also comprises: a frequency transposition module MTF for converting a signal in baseband or intermediate frequency into a signal in a carrier frequency band; and an amplification device DA comprising a pre-amplifier and an amplifier.

此外,该放大系统SA还包括:第二路径V2和用于将第一和第二路径V1、V2的信号相加的复合器设备S,其中,所述第二路径V2包括:具有有限脉冲响应的第二带通数字滤波器F2,所述第二带通数字滤波器F2用于在有用频带之外对由单元UGS生成的数字信号进行滤波;增益模块G,其置于所述第二数字滤波器F2的输出处;相位从动数控振荡器NCO,其置于增益模块G的输出处;以及,第二数字/模拟转换器CNA2,其置于相位从动数控振荡器NCO的输出处。Furthermore, the amplification system SA comprises a second path V2 and a multiplexer device S for adding the signals of the first and second paths V1, V2, wherein said second path V2 comprises: The second band-pass digital filter F2, the second band-pass digital filter F2 is used to filter the digital signal generated by the unit UGS outside the useful frequency band; the gain module G, which is placed in the second digital at the output of the filter F2; a phase driven numerically controlled oscillator NCO placed at the output of the gain block G; and a second digital/analog converter CNA2 placed at the output of the phase driven numerically controlled oscillator NCO.

频率移置模块MTF置于复合器设备S的输出和放大设备DA的输入之间。A frequency transposition module MTF is placed between the output of the multiplexer device S and the input of the amplification device DA.

在这个实例中,频率移置模块MTF包括:本地振荡器OL;混频器MEL,其适用于通过将所述频率移置模块MTF的输入信号与本地振荡器OL的输出信号相乘来以频率方式相加;以及,第三模拟带通滤波器F3,其用于隔离所述相乘的结果。In this example, the frequency translating module MTF comprises: a local oscillator OL; a mixer MEL adapted to multiply the input signal of said frequency translating module MTF by the output signal of the local oscillator OL to obtain a frequency mode addition; and, a third analog bandpass filter F3 for isolating the result of the multiplication.

本地振荡器OL规定了以其来对复合的信号进行调制的载波频率。模拟带通滤波器F3使得能够将放大设备DA的输入限制到信号(包括补偿)的有用频带。The local oscillator OL defines the carrier frequency with which the composite signal is modulated. The analog bandpass filter F3 makes it possible to limit the input of the amplification device DA to the useful frequency band of the signal (including compensation).

图1的实施例利用模块MTF的可选能力来同时管理有用信号和补偿信号。The embodiment of Fig. 1 utilizes the optional capability of the module MTF to manage both useful and compensation signals.

图2示意性地表示用于对由用于生成卫星信号的单元UGS生成的信号进行放大的系统SA。该放大系统SA包括:第一路径V1,其配备具有有限脉冲响应的第一带通数字滤波器F1,所述第一带通数字滤波器F1用于在有用频带之外对由单元UGS生成的数字信号进行滤波;以及,第一数字/模拟转换器CNA1,其置于所述第一数字滤波器F1的输出处。该放大系统SA还包括:频率移置模块MTF,其用于将基带中或者中频中的信号转换成载波频带中的信号;以及,放大设备DA,其包括预放大器和放大器。Fig. 2 schematically represents a system SA for amplifying signals generated by a unit for generating satellite signals UGS. This amplification system SA comprises: a first path V1 equipped with a first band-pass digital filter F1 with a finite impulse response, which is used outside the useful frequency band for the The digital signal is filtered; and, a first digital/analog converter CNA1 is placed at the output of said first digital filter F1. The amplification system SA also comprises: a frequency transposition module MTF for converting a signal in baseband or intermediate frequency into a signal in a carrier frequency band; and an amplification device DA comprising a pre-amplifier and an amplifier.

此外,该放大系统SA还包括:第二路径V2和用于将第一和第二路径V1、V2的信号相加的复合器设备S,其中,所述第二路径V2包括:具有有限脉冲响应的第二带通数字滤波器F2,所述第二带通数字滤波器F2用于在其有用频带之外对由单元UGS生成的数字信号进行滤波;增益模块G,其置于所述第二数字滤波器F2的输出处;相位从动数控振荡器NCO,其置于增益模块G的输出处;以及,第二数字/模拟转换器CNA2,其置于相位从动数控振荡器NCO的输出处。Furthermore, the amplification system SA comprises a second path V2 and a multiplexer device S for adding the signals of the first and second paths V1, V2, wherein said second path V2 comprises: The second band-pass digital filter F2, which is used to filter the digital signal generated by the unit UGS outside its useful frequency band; the gain module G, which is placed in the second at the output of the digital filter F2; a phase driven numerically controlled oscillator NCO placed at the output of the gain block G; and a second digital/analog converter CNA2 placed at the output of the phase driven numerically controlled oscillator NCO .

频率移置模块MTF包括包含以下各项的频率移置模块MTF:The frequency transposition module MTF includes a frequency transposition module MTF comprising:

第一频率移置子模块MTF 1,其置于第一路径V1上在第一转换器CNA1的输出和加法器S的输入之间,以及A first frequency displacement sub-module MTF1 placed on the first path V1 between the output of the first converter CNA1 and the input of the adder S, and

第二频率移置子模块MTF2,其置于第二路径V2上在第二转换器CNA2的输出和加法器S的输入之间。A second frequency transposition sub-module MTF2 is placed on the second path V2 between the output of the second converter CNA2 and the input of the adder S.

第一和/或第二频率移置子模块MTF1、MTF2分别包括:本地振荡器OL1、OL2;混频器MEL1、MEL2,其适用于通过将频率移置子模块MTF1、MTF2的输入信号与本地振荡器OL1、OL2的输出信号相乘来以频率方式相加;以及,第三模拟带通滤波器F3_1、F3_2,其用于隔离所述相乘的结果,从而使得能够限制放大设备DA的输入处的信号的频谱占用。The first and/or second frequency displacement sub-modules MTF1, MTF2 respectively include: local oscillators OL1, OL2; The output signals of the oscillators OL1, OL2 are multiplied to add frequency-wise; and, a third analog bandpass filter F3_1, F3_2 for isolating the result of said multiplication, thus enabling limiting the input of the amplification device DA Spectrum occupancy of the signal at .

图2的实施例在补偿信号的从动和增益方面简化了从动。The embodiment of Fig. 2 simplifies slaves in terms of slaves and gains of compensation signals.

Claims (6)

1.一种用于对由生成卫星信号的单元(UGS)生成的信号进行放大的系统(SA),包括:1. A system (SA) for amplifying a signal generated by a satellite signal generating unit (UGS) comprising: 第一路径(V1),其包括用于在其有用的频带之外对由所述单元(UGS)生成的数字信号进行滤波的具有有限脉冲响应的第一带通数字滤波器(F1),以及置于所述第一数字滤波器(F1)的输出处的第一数字/模拟转换器(CNA1),A first path (V1) comprising a first bandpass digital filter (F1) with a finite impulse response for filtering the digital signal generated by said unit (UGS) outside its useful frequency band, and a first digital/analog converter (CNA1) placed at the output of said first digital filter (F1), 频率移置模块(MTF),其用于将基带中或中频中的信号转换成载波频带中的信号,以及a frequency transposition module (MTF) for converting a signal in the baseband or intermediate frequency into a signal in the carrier frequency band, and 放大设备(DA),其包括预放大器和放大器,an amplification device (DA), which includes a pre-amplifier and an amplifier, 此外,所述系统(SA)的特征在于其包括:Furthermore, said system (SA) is characterized in that it comprises: 第二路径(V2),其包括用于在其有用的频带之外对由所述单元(UGS)生成的数字信号进行滤波的具有有限脉冲响应的第二带通数字滤波器(F2)、置于所述第二数字滤波器(F2)的输出处的增益模块(G)、置于所述增益模块(G)的输出处的相位从动数控振荡器(NCO)、以及置于所述数控振荡器(NCO)的输出处的第二数字/模拟转换器(CNA2),以及A second path (V2) comprising a second bandpass digital filter (F2) with finite impulse response for filtering the digital signal generated by said unit (UGS) outside its useful frequency band, set a gain block (G) at the output of the second digital filter (F2), a phase driven numerically controlled oscillator (NCO) placed at the output of the gain block (G), and a a second digital/analog converter (CNA2) at the output of the oscillator (NCO), and 复合器设备(S),其用于将所述第一和第二路径(V1、V2)的信号相加。A multiplexer device (S) for adding the signals of said first and second paths (V1, V2). 2.根据权利要求1所述的系统(SA),其中,所述频率移置模块(MTF)置于所述复合器设备(S)的输出和所述放大设备(DA)的输入之间。2. A system (SA) according to claim 1, wherein said frequency displacement module (MTF) is placed between the output of said multiplexer device (S) and the input of said amplification device (DA). 3.根据权利要求2所述的系统(SA),其中,所述频率移置模块(MTF)包括:本地振荡器(OL);混频器(MEL),其适用于通过将所述频率移置模块(MTF)的输入信号与所述本地振荡器(OL)的输出信号相乘来以频率方式相加;以及,第三模拟带通滤波器(F3),其用于隔离所述相乘的结果。3. The system (SA) according to claim 2, wherein said frequency displacement module (MTF) comprises: a local oscillator (OL); a mixer (MEL), which is adapted to The input signal of the local oscillator (OL) is multiplied by the input signal of the local oscillator (OL) to add frequency-wise; and a third analog bandpass filter (F3) is used to isolate the multiplied the result of. 4.根据权利要求1所述的系统(SA),其中,所述频率移置模块(MTF)包括:4. The system (SA) according to claim 1, wherein said frequency displacement module (MTF) comprises: 第一频率移置子模块(MTF1),其置于所述第一路径(V1)上在所述第一转换器(CNA1)的输出和所述加法器(S)的输入之间,以及a first frequency transposition sub-module (MTF1) placed on said first path (V1) between the output of said first converter (CNA1) and the input of said adder (S), and 第二频率移置子模块(MTF2),其置于所述第二路径(V2)上在所述第二转换器(CNA2)的输出和所述加法器(S)的输入之间。A second frequency transposition sub-module (MTF2) placed on said second path (V2) between the output of said second converter (CNA2) and the input of said adder (S). 5.根据权利要求4所述的系统(SA),其中,所述第一和/或第二频率移置子模块(MTF1、MTF2)分别包括:本地振荡器(OL1、OL2);混频器(MEL1、MEL2),其适用于通过将所述频率移置子模块(MTF1、MTF2)的输入信号与所述本地振荡器(OL1、OL2)的输出信号相乘来以频率方式相加;以及,第三模拟带通滤波器(F3_1、F3_2),其用于隔离所述相乘的结果。5. The system (SA) according to claim 4, wherein said first and/or second frequency displacement sub-modules (MTF1, MTF2) respectively comprise: a local oscillator (OL1, OL2); a mixer (MEL1, MEL2) adapted to add frequency-wise by multiplying the input signal of said frequency translating sub-module (MTF1, MTF2) with the output signal of said local oscillator (OL1, OL2); and , a third analog bandpass filter (F3_1, F3_2) for isolating the result of the multiplication. 6.一种用于对卫星信号进行放大的方法,包括以下步骤:6. A method for amplifying satellite signals, comprising the steps of: 在第一路径(V1)上,对发射的信号进行数字滤波(F1)以便消除偏离有用频带的部分并且将获得的数字信号转换(CNA1)成模拟信号,On the first path (V1), the transmitted signal is digitally filtered (F1) in order to eliminate the part deviating from the useful frequency band and the obtained digital signal is converted (CNA1) into an analog signal, 在第二路径(V2)上,对发射的信号进行数字滤波(F2)以便消除偏离有用频带的部分;将增益(G)应用于获得的数字信号;同步所述信号以与所述第一路径的信号一致;以及,将所述获得的数字信号转换(CNA2)成模拟信号,On the second path (V2), the transmitted signal is digitally filtered (F2) in order to eliminate the part deviating from the useful frequency band; a gain (G) is applied to the obtained digital signal; said signal is synchronized to the first path and, converting (CNA2) said obtained digital signal into an analog signal, 将所述第一和第二路径(V1、V2)的信号相加(S),adding (S) the signals of said first and second paths (V1, V2), 执行频率移置(MTF),以便将基带中或中频中的信号转换成载波频带中的信号,以及perform a frequency shift (MTF) to convert a signal in baseband or intermediate frequency to a signal in the carrier frequency band, and 在发射之前对所述信号进行放大(DA)。The signal is amplified (DA) before transmission.
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